Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
  • F28D7/163—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing
  • F28D7/1638—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing with particular pattern of flow or the heat exchange medium flowing inside the conduits assemblies, e.g. change of flow direction from one conduit assembly to another one
  • F28D7/1646—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with conduit assemblies having a particular shape, e.g. square or annular; with assemblies of conduits having different geometrical features; with multiple groups of conduits connected in series or parallel and arranged inside common casing with particular pattern of flow or the heat exchange medium flowing inside the conduits assemblies, e.g. change of flow direction from one conduit assembly to another one with particular pattern of flow of the heat exchange medium flowing outside the conduit assemblies, e.g. change of flow direction
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
  • B60H1/00—Heating, cooling or ventilating [HVAC] devices
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
  • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
  • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
  • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
  • F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
  • F02M26/32—Liquid-cooled heat exchangers
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
  • F28D7/1607—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation with particular pattern of flow of the heat exchange media, e.g. change of flow direction
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
  • F28D7/1684—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits having a non-circular cross-section
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F1/00—Tubular elements; Assemblies of tubular elements
  • F28F1/02—Tubular elements of cross-section which is non-circular
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
  • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
  • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
  • F28D21/0001—Recuperative heat exchangers
  • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
  • F28F9/22—Arrangements for directing heat-exchange media into successive compartments, e.g. arrangements of guide plates
  • F28F2009/222—Particular guide plates, baffles or deflectors, e.g. having particular orientation relative to an elongated casing or conduit
  • F28F2009/224—Longitudinal partitions
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2275/00—Fastening; Joining
  • F28F2275/06—Fastening; Joining by welding
  • F28F2275/067—Fastening; Joining by welding by laser welding
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
  • Y02T10/00—Road transport of goods or passengers
  • Y02T10/10—Internal combustion engine [ICE] based vehicles
  • Y02T10/12—Improving ICE efficiencies

Definitions

• the current configuration of the EGR exchangers on the market corresponds to that of a metal heat exchanger generally made of stainless steel or aluminum.
• EGR heat exchanger There are essentially two types of EGR heat exchanger: a first type consists of a carcass inside which is placed a bundle of parallel tubes for the passage of gases, the cooling fluid flowing through the carcass outside tubes; the second type comprises a series of parallel plates constituting the heat exchange surfaces, the exhaust gases and the cooling fluid circulating between two plates, in alternating layers, and fins that can be arranged to improve the heat exchange .
• the junction between the tubes and the carcass can be of different types.
• the tubes are fixed at their ends between two support plates coupled to each end of the carcass, the two support plates having a plurality of orifices for mounting the respective tubes.
• baffles are used to improve the circulation of the cooling fluid around the gas tubes and thus avoid the formation of stagnation points that can cause the cooling fluid to boil in the exchanger, and to cool uniformly. all the tubes and thus achieve a better performance of the heat exchanger.
• deflectors In other cases, the incorporation of deflectors is intended to avoid mechanical problems that may occur in the operating conditions of the heat exchanger in the engine. Various reasons justify the use of baffles in the exchanger, in particular:
• a very large carcass diameter can give rise to very low speeds of the cooling fluid around the gas tubes.
• the exchanger is, in some cases, inserted into other components such as the DPF (Diesel Particulate Filter), that is to say the device for eliminating the particles of the exhaust fumes. a diesel engine.
• the shell of the exchanger must therefore be adapted to the diameter of the DPF, this diameter being normally greater than that of conventional circular exchangers.
• the inlet and outlet ducts of the cooling fluid must both be placed on the same side of the carcass, in other words on the opposite side to that introduced into the DPF.
• a known solution is to use various transverse deflectors disposed inside the carcass of circular section to ensure proper distribution of the cooling fluid and simultaneously strengthen the mechanical strength of the part subjected to vibration. These deflectors are attached to the carcass by welding in the oven, and are not aligned longitudinally but arranged alternately.
• JP2000292089 and JP2000283666 disclose various designs of transverse deflector plates disposed within carcasses of circular section, the inlets and outlets of the coolant being separated, each at one end of the carcass.
• the designs of the deflector plates are very similar to those of the support plates located at both ends of the carcass for securing the ends of the tube bundle, and have the same diameter corresponding to the inside diameter of the carcass.
• These deflector plates have some holes for the passage of the tubes and larger holes in the rest of their surface for the passage of the cooling fluid. These larger holes of the deflector plates are distributed alternately in the longitudinal direction.
• Patent KR20080013457 describes a helical deflector inserted in a carcass of circular section.
• the subject of the present invention is an exchanger of heat for gas, especially for the exhaust gas of an engine, to overcome the disadvantages of exchangers known in the art, the heat exchanger being capable of improving the distribution of the cooling fluid to achieve a performance optimal.
• the deflection means make it possible to bring the cooling fluid to the high temperature zones of the gases or where the speeds of the cooling fluid are very low.
• the use of the deflection means can also enhance the mechanical strength of the heat exchanger.
• the deflection means are deflector means.
• the deflector means comprise a longitudinal baffle disposed at a suitable distance from the inner wall of the carcass to allow passage of the cooling fluid stream to the inlet end of the gas, and a plurality of transverse baffles arranged alternately along the longitudinal baffle and provided with passage cutouts for homogeneously directing the flow of cooling fluid from the gas inlet end to the gas outlet end in a substantially helical path.
• the distribution of the gas tubes in the support plate must be locally modified so as to increase the distance between said tubes relative to the distance between the other rows of tubes. by giving it a value slightly greater than twice the thickness of the longitudinal deflector to guarantee the longitudinal deflector a sufficient space for positioning and contact.
• the longitudinal baffle is joined to the support plate opposite the gas inlet directly or by providing a small space depending on the joints and materials.
• the distance between the longitudinal baffle and the inner wall of the carcass in which is located one of the cooling fluid conduits is about one or two rows of gas tubes.
• the length of the longitudinal baffle depends on the diameter of the carcass and the technology of the gas tubes used.
• some transverse deflectors are joined directly to the deflector longitudinal, and other transverse deflectors are joined to the inner wall of the carcass.
• the number and position of the transverse deflectors depend on the diameter and the length of the carcass.
• a first transversal deflector closer to the gas inlet support plate is disposed at one end of the longitudinal deflector.
• the remainder of the transverse deflectors, arranged after said first transverse deflector, are distributed so as to provide an increasing distance between them as they move away from the gas inlet and therefore the larger zone. hot.
• the transverse baffles are of smaller size than the support plates, and have cutouts at their peripheral surface for the passage of the cooling fluid.
• the helical flow is obtained because of the different position of the main cuts.
• To design and distribute correctly said main cuts it is necessary to take into account the position of the outlet duct of the cooling fluid.
• the Design of the longitudinal deflectors and their passage cutouts must be carried out taking as starting point the longitudinal deflector closest to the outlet duct of the cooling fluid.
• the longitudinal deflector comprises small-size cuts to obtain a minimum flow of coolant through it and avoid low velocity areas.
• the position of these cuts will depend on the relative position of the transverse deflectors.
• the junction of the deflector means depends on the type of materials used.
• the deflector means are metallic.
• the carcass comprises ribs, longitudinal or transverse, which guide the plastic deflectors during their assembly process and prevent their movement in the operating conditions.
• the transverse deflectors are made of plastic and the longitudinal deflectors are metallic.
• the longitudinal deflector comprises a step portion to bypass one of said ducts.
• Figure 2 is a perspective view of the deflector means of Figure 1 more clearly illustrating their position in the carcass;
• Said carcass 2 comprises two inlet ducts 4 and outlet 5 of the cooling fluid disposed close to each other and on the same side of the carcass.
• Said exchanger 1 also comprises deflector means 6, 7a-7d disposed inside the carcass 2 capable of directing the countercurrent flow of cooling fluid with respect to the flow of the gas flow in at least a part of said carcass 2.
• Said transverse deflectors 7a-7d are provided with passage cutouts 9, 10 (see FIGS. 2 and 3) making it possible to homogeneously direct the flow of cooling fluid from the inlet end of the gases 8a toward the end of gas outlet 8b in a substantially helical path, illustrated by the arrow line of FIG.
• the distance between the longitudinal baffle 6 and the inner wall of the carcass 2 in which is located the inlet duct 4 of the cooling fluid is about one or two rows of gas tubes. In this way, the cooling fluid is rapidly brought to the gas inlet 8a.
• the length of the longitudinal deflector 6 depends on the diameter of the carcass 2 and the technology of the gas tubes used.
• transverse deflectors 7a, 7c, 7d are joined directly to the longitudinal deflector 6, while other transverse deflectors 7b are joined to the inner wall of the carcass 2.
• a first transversal deflector 7a closer to the gas inlet support plate 3a 8a is disposed almost at one end of the longitudinal deflector 6.
• the length of said first transverse deflector 7a is sufficiently large to guarantee a passage zone for the cooling fluid. similar to the distance between the longitudinal deflector 6 of the inner wall of the carcass 2.
• transverse deflectors 7b-7d arranged after said first transverse deflector 7a, are distributed so as to form between them an increasing distance as they move away from the gas inlet 8a and therefore the zone hotter.
• the helical flow is obtained because of the different position of the main cuts 10.
• the design of the longitudinal deflectors 6 and their passage cutouts 9, 10 must be made taking as starting point the longitudinal deflector 7a closest to the outlet duct 5 of the cooling fluid.
• the junction of the deflector means 6, 7a-7d depends on the type of materials used.
• the deflector means 6, 7a-7d are made of plastic.
• the carcass 2 has ribs, longitudinal or transverse, which guide the plastic deflectors 6.7a-7d during their process. assembly and which prevent their movement in the operating conditions.
• the transverse deflectors 6, 7a-7d are made of plastic and the longitudinal deflectors 6 are metallic.
• the plastic baffles 7a-7d are attached to the metal baffle 6 by means of small wings made therein.
• the deflector means means
• Figures 1 to 4 illustrate an embodiment in which the inlet ducts 4 and the outlet 5 of the cooling fluid are separated by a distance large enough to allow the establishment of a longitudinal deflector 6 plane.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• General Engineering & Computer Science (AREA)
• Thermal Sciences (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Geometry (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Exhaust-Gas Circulating Devices (AREA)

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Publications (2)

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Cited By (7)

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• 2009
  • 2009-11-18 ES ES200931016A patent/ES2394406B1/es not_active Expired - Fee Related
• 2010
  • 2010-11-09 WO PCT/EP2010/067082 patent/WO2011061090A2/fr active Application Filing
  • 2010-11-09 ES ES10773360.2T patent/ES2669028T3/es active Active
  • 2010-11-09 KR KR1020127015484A patent/KR101793752B1/ko active IP Right Grant
  • 2010-11-09 IN IN4893DEN2012 patent/IN2012DN04893A/en unknown
  • 2010-11-09 EP EP10773360.2A patent/EP2502016B1/de active Active

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